package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper ordersMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map<String,Object> map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",5);
            Double turnover=ordersMapper.sumByMap(map);
            turnoverList.add(turnover==null?0.0:turnover);
        }
        return TurnoverReportVO.builder().dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,",")).build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList=new ArrayList<>();
        List<Integer> totalUserList=new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            Map<String, Object> map = new HashMap<>();
            map.put("begin", beginTime);
            Integer totalUser = userMapper.countByMap(map);
            map.put("end", endTime);
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            Integer validOrderCount = getOrderCount(beginTime, endTime, 5);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate = 0.0;
        if(totalOrderCount != 0){
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = ordersMapper.getSalesTop10(beginTime, endTime);
        List<String> names = salesTop10.stream().map(x -> x.getName()).toList();
        String nameList = StringUtils.join(names, ",");
        List<Integer> numbers = salesTop10.stream().map(x -> x.getNumber()).toList();
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder().nameList(nameList).numberList(numberList).build();
    }

    @Override
    public void exportBusinessDate(HttpServletResponse response){
        try {
            LocalDate dateBegin = LocalDate.now().minusDays(30);
            LocalDate dateEnd = LocalDate.now().minusDays(1);
            BusinessDataVO businessData = workspaceService
                    .getBusinessData(LocalDateTime
                            .of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
            InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
            XSSFWorkbook excel = new XSSFWorkbook(in);
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + " 至 " + dateEnd);
            sheet.getRow(3).getCell(2).setCellValue(businessData.getTurnover());
            sheet.getRow(3).getCell(4).setCellValue(businessData.getOrderCompletionRate());
            sheet.getRow(3).getCell(6).setCellValue(businessData.getNewUsers());

            sheet.getRow(4).getCell(2).setCellValue(businessData.getValidOrderCount());
            sheet.getRow(4).getCell(4).setCellValue(businessData.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                sheet.getRow(7 + i).getCell(1).setCellValue(date.toString());
                sheet.getRow(7 + i).getCell(2).setCellValue(businessData.getTurnover());
                sheet.getRow(7 + i).getCell(3).setCellValue(businessData.getValidOrderCount());
                sheet.getRow(7 + i).getCell(4).setCellValue(businessData.getOrderCompletionRate());
                sheet.getRow(7 + i).getCell(5).setCellValue(businessData.getUnitPrice());
                sheet.getRow(7 + i).getCell(6).setCellValue(businessData.getNewUsers());
            }

            ServletOutputStream os = response.getOutputStream();
            excel.write(os);

            excel.close();
            os.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map<String, Object> map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);
        return ordersMapper.countByMap(map);
    }

}
